Neverwhere by Neil Gaiman

Richard Mayhew is a young businessman in modern-day London. His good nature and kind heart lead him into a grimy Victorian underworld crawling with rats, angels, vampires and monsters. This dark adventure is filled with interesting plot twists, great female characters and a good ending. It’s the kind of book that’s hard to put down. And even when you do put it down you keep thinking about it. The book is based on a miniseries Gaiman created for BBC in 1996. It’s also been made into a comic book and a role-playing game.